Buckle-plate



H. J LEWIS. BUCKLE PLATE.

(No Model.)

Patented Feb. .1 1892.

UNITED STATES PATENT OFFICE.

HARRY J. LEIVIS, OF PITTSBURG, PENNSYLVANIA.

BUCKLE-PLATE.

SPECIFICATION forming part of Letters Patent No. 469,063, dated February16, 1892. Application filed October 12, 1891. Serial No, 408,457- (Nomodel.)

To aZZ whom it'may concern.-

Be it known that I, HARRY J. LEWIS, a citizen of the United States,residing at Pittsburg,in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inBuckle-Plates; and I do hereby declare the following to be a full,

' clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to that class of buckle plates placed between thejoists of floors in buildings and between the girders of bridges; and myobject is to strengthen the sloping sides of the plate to prevent themfrom bending or collapsing under the strain, wherein larger sizes can bemade available.

To this end my invention consists in' the peculiar features andcombinations of parts, more fully described hereinafter, and pointed outin the claims.

In the accompanying drawings, Figure 1 represents a top view of abuckle-plate hav-' ing four arched sides to which my improvement isapplied; Fig. 2, a section through the center and through X X of theabove view; Fig. 3, a top view of a modification in which the shape ofthe plate is given that of a pyramid with additional corrugations; Fig.4, a transverse central section through X X of the preceding figure.

The letter a represents the four equal sides of a plate having arectangular base formed by a flange I). These sides are composed of twovery low arches arranged at right angles to each other, said archesintersecting at diagonal lines or groins 0, extending over from cornerto corner of the base. Across the central portion of each side areformed oval corrugations or depressions d, which extend or radiate fromnear the top or center of the arch to or nearly to its base. The bottom6 of the corrugations is straight and forms a brace to stiffen andprevent the sides from bending.

vTo further describe the corrugations, itwill be stated that the bottomor vertex 6 of each projects downward or inward. In Figs. 3 and 4 amodification is shown, in which the sloping sides are straight andprovided with smaller intermediate corrugations projecting inward andoutward.

It is evident that my invention could be varied in many other slightways that would naturally suggest themselves to a skilled mechanic.Therefore I do not limit myself to the exact construction herein shown,but consider myself entitled to all such variations as come within thespirit and scope of my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A buckle-plate in which the sloping sides are provided with radiatingcorrugations or depressions, as and for the purpose substantially asdescribed.

2. A groined buckle-plate in which the sloping sides are provided withcorrugations or depressions, as set forth.

3. The herein-described groined buckleplate, in which the sloping sidesare provided with oblong corrugations having their longest diametersextending away from thebase of the plate. substantially as and for thepurpose set forth.

4:. A groined buckle-plate in which the sloping sides are provided withintegral depressions or corrugations projecting beyond the exteriorsurface of the sides, as and for the purpose set forth.

In testimony whereof Iaffix my signature in presence of two witnesses.

HARRY J. LE WIS.

\Vitnesses:

Looms O. FRAZIER, DANIEL J SULLIVAN.

